Power electronics and electric drives for traction. High power factor converters for singlephase ac traction drives. It is used for local delivery of good in large towns with maximum daily run of 50 to 60 km. Installation, labour and commissioning charges for the drive, motor and power conditioning apparatus should be determined. The system which uses electrical power for traction system i. In fact, in many industries they are the largest enduse of electricity, followed by nonprocess uses such as lighting and hvac, which also uses motors and electric process heat. The dc motor was the mainstay of electric traction drives on both electric and diesel electric locomotives, streetcarstrams and diesel electric drilling rigs for many years. Sep 11, 2016 three phase induction motors provides constant speed operation, developing low starting torque drawing high starting current and complicated control networks makes it unsuitable for electric traction work. System such a diesel electric drive, electric drive etc. A system which causes the propulsion of vehicle in which tractive or driving force is obtained from various devices such as diesel engine drives, steam engine drives, electric motors, etc. For 25 years, saminco international has been developing and manufacturing high power dc and ac drives and complete electrical systems. Electric railways are energysaving to start with, but they drive inertial load, so the electric power system must supply peak power at acceleration. Nov 15, 2016 this video provides a general perspective of how electric drives technology is a key technology that facilitates to produce devices that we can find in our daily live such as. Electric traction is meant for locomotion in which the driving tractiveforce is obtained from electric motors called as traction motors.
Rating and heating of electric drives, power loss, heating and cooling of motors, classes. Optimising power management strategies for railway traction. Power electronics advancement in electric traction drives. Each drive type is best suited for a specific application in the elevator market.
Power supply installation in electric traction irieen. High power factor converters for singlephase ac traction drives a. A 440 v, 60 hz induction motor is to be used on a 50 hz supply. The electrical drive uses any of the prime movers like diesel or a petrol engine, gas or steam turbines, steam engines, hydraulic motors and electrical. Electric traction systems are various electrical systems that are used to drive railways. This book is prepared for undergraduate students of various indian universities and those preparing for associate membership examination of the institution of electrical engineers india as well the diploma in electrical engineering examination of various boards of technical education covering the subjects electric drives and control and utilisation of electric energy. International conference on power electronics, machines and drives 2004.
Traction power electrification system investigation wmata. A survey find, read and cite all the research you need on researchgate. Influences of eddy currents on underground metallic pipes and cables. Electric railways use either electric locomotives hauling passengers or freight in separate cars or electric multiple units passenger cars with their own motors. This key component has a direct impact on road performance, driving range and reliability of the vehicle also as a consequence of their weight and size. Reinforced galvanic isolation is provided by power integrations revolutionary solid insulator fluxlink technology. Power fet trends in motor drives silicon carbide sic mosfets are gaining traction in the power stage for motor drives. Dec 20, 2016 this video provides a short introduction to electric drive technology for traction applications.
Electric traction system requirements, terms, advantages. Pdf types of power quality disturbances on ac electric traction. Power modules for electric traction hybrid and battery. Traction electric drive for railway application has to provide the adjustment of both rotor speed and. Elaphe has tested its fully electric inwheel drive on a frozen river in china at temperatures of below. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled.
Electricity enables faster acceleration and higher tractive effort on steep gradients. Dc traction units use direct current drawn from either a conductor rail oran overhead line. Ppt electric traction system powerpoint presentation. Electrical railway transportation systems ieee press series. Rating and heating of electric drives, power loss, heating and cooling of motors, classes and. The traction inverter converts energy from the vehicles battery in order to drive the motors in the drivetrain. Energy storage for traction power supply systems 30 circuit configuration fig. Pdf on jun 1, 20, mohan krishna and others published types of power quality disturbances on ac electric traction drives.
The way of giving the power supply to locomotive unit is generally referred as traction electrification system. The system which is used for controlling the motion of an electrical machine, such type of system is called an electrical drive. Ppt electric traction system powerpoint presentation free. Slovenian company elaphe is also making inwheel technology for application in electric vehicles fig. The main advantage of electric traction is a higher power toweight ratio than forms of traction such as diesel or steam that generate power on board. A novel power flow algorithm for traction power supply. Download free sample and get upto 51% off on mrprental. Types of power quality disturbances on ac electric traction. Electric traction is part of subject utilization of electrical energy.
Most of these leaned towards electrification, especially for hightraffic sections. May 22, 2018 a traction system causes the propulsion of vehicle in which tractive or driving force is obtained from various devices such as diesel engine drives, steam engine drives, electric motors, etc. It is an applicationoriented book for the design and development of traction systems accompanied by a description of the core technology. India took the plunge from dc to ac electric traction in the mid1950s, as mentioned above. Acdc converters topology in traction application for dc motor drive monica tripathi1, hitesh lade2. Electric locomotives have provided hauling power to trains since 1837. Electric traction, ac locomotives, harmonics, unbalance, flicker and thyristor. As a consequence, nearly 23rd of all electrical power is utilized by electrical machines in the form of electric drives. Electric drive is more and more popular for its simplicity, cleanliness, easy and smooth control, flexibility in. A traction power network is employed to supply the electrical power to the.
Numerous efforts to use traction induction drive instead of obsolete and unserviceable dc motors with 18 step power circuit breakers with power starting resistors were not reliable. The electric drive has very large range of torque, speed and power. In deep and trustful partnerships with vehicle builders, refurbishers, and rail operators, we supply stateoftheart traction systems. The purpose of power modulebased traction inverter is to convert the dc current from the electric vehicles battery to ac current to be used in the electric motor to drive the vehicles propulsion system. Railway technology today 3 edited by kanji wako railway.
Nov 30, 2015 trolley buses or tramways supplied with dc supply i. The electric power is supplied to the locomotive propulsion drives via overhead lines. The most popular line voltages for overhead wire supply systems 1500vdc and 3000v dc. It consists of two parts, a rotating armature and fixed field windings surrounding the rotating armature mounted around a shaft. Fuji electric has a history of manufacturing and supplying numerous electric power supplies for dieselpowered railcars to train companies, mostly including japan. Electric traction system 1 electric traction system presented by amit raj roll no. Abstract in the last years new power transistors, characterized by a high commutation. Power failure for few minutes can cause traffic dislocation for hours. The rise in oil prices in the mid1970s tilted the argument further in favour of electric traction as electricity generation in most of india is hydroelectric or coalbased.
Railway transportation systems for a comfortable future. German company ziehlabegg created a motor for an inwheel hub drive that could be used in serial hybrid, battery, and fuelcell commercial vehicles. The focal point of the book will be the disposition of electric traction units powered by threephase induction motors. Power supply 25 kv, ac, 50 hz single phase power supply for electric traction is derived from the grid of state electricity boards through traction substations located along the route of the electrified sections at distance of 35 to 50 km apart. The sic1181kq and sic1182kq are single channel gate drivers for sic mosfets. Sic mosfets however differ from igbts in the switching frequency requirement. Presently, there are four types of track electrification systems are available based on the availability of supply. Abb is the expert for traction converters, motors, transformers, and complete traction chain solutions.
For the purpose of signaling and reliable operation the 25 kv is converted to 240 v through. In other words, the drive which uses the electric motor is called electrical drive. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. The circuitry of the input converter which provides a dc supply for the load side converter. Power electronics and electric drives for traction applications gonzalo abad on. Unless the traffic to be handled is heavy, electric traction becomes uneconomical. Review of characteristics of different types of dc and ac motors used traction and their suitability moduleiv 10 hours rating and heating of electric drives, power loss, heating and cooling of motors, classes and duty and selection of motors, drives for specific application like steel, paper, textile mills. Electricity is typically generated in large and relatively efficient generating stations. There may be two types of traction classifications on the basis of power supply. The book covers the following topics three phase circuits and power magnetics transformers concept of electrical machiners dc motors three phase windings induction machines electric drives full notes, pdf, ebooks. Inwheel motor systems will propel ev performance power. Electric motors and drives fundamentals, types and applications third edition austin hughes senior fellow, school of electronic and electrical engineering, university of leeds amsterdam boston heidelberg london new york oxford paris san diego san francisco singapore sydney tokyo newnes is an imprint of.
A traction system causes the propulsion of vehicle in which tractive or driving force is obtained from various devices such as diesel engine drives, steam engine drives, electric motors, etc. These drives are dc scr thyristor, ac inverter vvvf and ac vector. Dependence of traction force, braking force and power factor on the speed 3 results of measurement the results of measurements in electric traction power supply ets plase are presented and analysed subsequently. Integrated traction and auxiliary power supply converters for diesel electric rail vehicles m. Electric motors and drives account for a substantial share of electricity use in the commercial and industrial sectors. Igbts and sic mosfets, are a good fit in high power ac power stage applications due to their high voltage ratings and high current ratings.
The electric drives operate on all the quadrants of speed torque plane. Main inverter electric traction stmicroelectronics. Traction force, besides the speed, also depends on the excitation current, i. Trolley buses or tramways supplied with dc supply i. Power electronics advancement in electric traction drivesan. The railway system division, in its commitment to future progress, has consistently achieved technological breakthroughs on three systems that are shaping the future worldwide. The first two in this series of tutorial articles described traction drives with dc motors and threephase ac induction motors. The rcc includes the main control room, equipment room, uninterrupted power supply ups room, remote control laboratory and battery room and is the nerve centre of the traction power control. It consists of two parts, a rotating armature and fixed field windings surrounding the.
Traction means drawing or pulling something over a surface. For traction purposes mostly 3phase induction motors and d. It involves utilization of electric power for traction systems i. It also plays a significant role in capturing energy from regenerative braking and feeding it back to the battery.
It is a summary of chapter 1 of the book power electronics and electric drives for traction. Pdf electric drives of traction rolling stocks with ac. Up to 8 a peak output drive current enables the product to drive devices with nominal currents of up to 600 800 a typical. The system which use electrical power for traction system i. Challenges of modern ac motor traction drives prof. Costantini department of electronic engineering, university of rome tor vergata, italy. Electric machines are replacing ices even in traction applications such as vehicles and ship propulsion. Matlabsimulink based model for 25 kv ac electric traction. Section 1 general information mn770 general information 11 introduction baldor electric manufactures several different drive types for the elevator industry. Railway technology today 3 edited by kanji wako railway electric power feeding systems yasu oura, yoshifumi mochinaga, and hiroki nagasawa introduction electric power technology in the railway industry refers to the means of supplying goodquality electric power to the electric motors. Power electronics and electric drives for traction applications offers a practical approach to understanding power electronics applications in transportation systems ranging from railways to electric vehicles and ships. Its a very important topic for various recruitment exams like state electricity board exams etc. Traction power electrification system investigation report washington metropolitan area transit authority. Electric traction, multilevel converter, power electronics traction transformer, power supply in electric traction drives, unconventional current collection from a contact line i.
During the test drives, the values of total harmonic distortion, unbalance. On locomotives equipped with regenerative brakes, descending gradients require very little use of air brakes. Their working is independent of the environmental condition. Power electronic devices for railway vehicles fuji electric.
Schindler 3300 mrl traction elevator layout data sheets. Dec 15, 2015 power electronic converters are used everywhere in normal daily routines at home, commercial workplaces or in an industrial environment. General presently we are using power electronics in railways as a. In conclusion, the design of the power supply network of dc electri ed transit railways requires the simulation of the high voltage network when several substations are connected to the same high voltage loop. Motorend inverter can be a current source inverter or a voltage source inverter3. Traction systems for locomotives and high speed applications. The paper considers the variation of circuit design of the electric drives in traction rolling stocks when traditional dc electric machines are replaced with ac electric machines. The most vital factor against electric traction is the initial high cost of laying out overhead electric supply system. Due to the high power handling with higher efficiencies, these converters become an integral part of industrial electric drives, high electric power supplies, electric traction systems and automobile control equipments. Track design handbook for light rail transit, second edition 112 11. Many interactions exist between train movement, traction drives and power supply. Electric and magnetic fields under contact lines and in proximity of the traction power installations.
K pandey2 1,2department of electrical engineering 1,2madan mohan malviya university of technology, gorakhpur, india abstract this paper presents the power electronics advancement in electric traction drives. We shall discuss the stationary and dynamical behaviour of the squirrelcage induction motors and the principle and construction features of pulsecontrolled inverters, as well as scalar and fieldoriented control systems and fourquadrant power converters, feeding the dc. The following are the advantages of electrical drive. Electrical contractor to supply an additional lockable auxiliary nonfused disconnect in the hoistway at the location of the drive motor controller, along with wiring from the main disconnect to the auxiliary disconnect see. Design of power supply system in dc electrified transit. The locomotive should be selfcontained and able to run on any route braking should be such that minimum wear is caused on the brake shoes if possible the braking energy should be regenerated and returned to the supply. Railway technology today 3 edited by kanji wako railway electric power feeding systems yasu oura, yoshifumi mochinaga, and hiroki nagasawa introduction electric power technology in the railway industry refers to the means of supplying goodquality electric power to the elec. Power electronics advancement in electric traction drivesan overview gaurav kumar mishra1 a. The railway receives 3phase power supply from the supply authority.
745 499 1049 141 123 1118 35 260 761 1552 687 1098 185 465 1225 750 1365 116 545 1195 1021 1424 1294 510 750 1008 816 1239 414 335 1453 976 164 600 54 517 544 29 173 772